is there a graphic device that can graph xyz=1? if so, what does it look like? i tried the 'geogebra 3d calculator' and it didn't work out so well
edit* thank you so much for answering! it helped me a lot
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$\begingroup$One simple way is to use Google. Type 1/(x*y) in google, you will get a 3-d plot.
Another free tool is 3-D Plot and Math-Picks.
There are other more fancy tools such as MatLab, but they are not free.
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